A grateful pet owner has thanked the brave pup who saved her life after it alerted her to a fire which would have blown up their house within minutes. Diane Thompson, 51, initially told her 1-year-old Jack Russell, Bella, to come back to bed when she woke up to her barking at 3:30 a.m. on Saturday, Feb. 6. But suddenly realizing she could smell smoke, the retired farm worker who lives alone in Alford, UK, discovered an electrical fault under the stairs had caused flames to break out right next to the gas meter. Now, the mom of one has called Bella a God-send for waking her up in time to flee and call fire crews who doused the flames minutes before they would have caused an explosion. “Having a dog is the whole reason I’m alive,” she said. “Bella woke me up barking and I told her come back …